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Up to now, global attention has been paid to various energystorage devices, such as Li-ion batteries, fuel cells, supercapacitors, etc., due to the ever-increasing energy demands and environmental problems.Among them, supercapacitors have shown highly promising application due to their high power density, low cost, and long cycle life.The specific capacitance of pseudocapacitor is much higher than that of EDLC on account of the Faradic redox reaction on the surface of pseudocapacitive materials.